I've had my bluespot for several months in a nano and he was great, I transferred him into my 75 a week ago and he seemed to be adjusting well. But when I woke up this morning he was nowhere to be found. At first I thought he jumped out but I never found him lying around. I don't have any crabs other than hermits, but I have seen a lot of brittle worms lately, could they be considered suspects?